Sand-blast.



PATENTBD APB.. 26. 1904.

F. STICKER. 'SAND BLAST. APPLIOATION FILED MAY 29, 1903. 5

N0 MODEL.

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Patented April 26, 1904i v i PATENT OEEICE.

FRANCIS STICKER, OF NEW YORK, N. Y.

SAND-BLAST.

SPECIFICATION forming part of Letters PatentV N0. 758,118, dated April26, 1904.

' Applicata ne@ May 29, 190e. serial No. 159.354. (No model.)

To all whom timmy concern/.-

Beit known that 1, FRANCIS STICKER, of. vNew York, in the county of NewYork and State of New York, have invented certain new and usefulImprovements in Sand-Blasts; and v lI do hereby declare the following tobe a full,

-the sand and for so controlling such introduction that the necessarysupply of air mayV be had without unnecessary waste. The invention willbe hereinafter fully set forth, and particularly pointed out in theAclaims.

In the accompanying drawings, Figure 1 is a view in side elevation withparts broken away. Fig. 2- is a vertical sectional view. Fig. 3 is asectional view of the cock and pipe branches. Fig. 4 is a view of thecock in -side elevation. v

Referring to the drawings, 1 designates a' casing constituting thesand-receptacle, suitably mounted and provided Ywith openings 2 3 4 atthe top, side, and bottom, designed, re-

spectively, to permit introduction of sand,

access to the interior, and emptying of the re ceptacle;

frais pipe is of peculiar formation. The end opening into the casing isflared outwardly, and beneath such {iared portion the-pipe is taperedand bent at about right angles, as at 7. Itis then carried downwardly,forming a -vertical arm 8, at the upper and lower ends of which areenlarged portions constituting chambers f 9 10, the pipe beingcontracted between the chambers, as at 12. Fromchamber() the4 f pipe isbent horizontally to Vform an arm 13, which is tapered toward its freeend, the enlarged portion of such armconstituting practically aright-angular extension of chamber 10. A hose or other iiexible tubingis designed to be attached to arm 13 and held to the work by theoperator.

The bottompf the casing is pro' vided with `a central outletV 5, in linewith which a pipe 6 is secured to the casing.

f, On top of the casing is a casting 14, having a chamber 15. Y

16 designates a tubular rod vertically disposed within the casing andchamber and having a port 17 at a point within the latter and a seriesof circularly-arranged ports 18 at a point within the casing and' justabove the normal level of the Sand therein. At its lower end the rodcarries'a valve- 19 of 'size and formation corresponding to the flaredend of pipe6. The pointed end of the valve has an outlet-port 2O in linewith the passageway extending through the Vtubular rod 16. The rod isthreaded at 21 to engagea threaded A bushing 22 in casting 14. By meansof handle 23 the rod may be turned to regulate the position of valve 19with relation to pipe 6, and thus control the outlet of sand.

24 designates the supply-pipe leading'from l an air-compressor. At'25this pipe diverges into three branches 26 27 28, a cock 29 being locatedat the lpoint of divergence. The branch 26 extends to the top of thecasing andl opens into chamber 15.4 vBranch 27 is` provided with avertical portion vhaving a nozzle 30 disposed in the plane of arm 8 ofpipe 6 and into chamber 9 thereof, the end of the nozzle extending wellinto the chamber.

Branch 28 carries a nozzle 31, horizontally disposed in the plane of'arm 13 and into chamber 10, this nozzle also extending well into itschamber. l 'j l Y The cock 29 is provided with/three ports 32l 38 34,designed, respectively, to register branches 27 and 28 are closed,between branches 26 and 27 and the air-supply while branch `Y28 --isclosed, and Asimultaneously bey' tween all the branches and theair-supply.v

regulate the outlet, and `air is admitted to branch 26 by a partial turnof thel cock. The air passes into chamber 15 and through port 17 intothe tubular rod 16, through which lat- Inoperation the receptacle 1 issuppliedj "with sand from a suitablesource, the leveliof lthe'sandbeing'maintained slightly below the ports 18. Rod` 16 is thenAmanipulated to' and into pipe 6. 'Ihe results of this suction actionare enhanced by the air-outlet being well in advance of the body of sandand the shape :of the sand-passage formed by the walls of the valve andthe pipe. When the blast has become established by the air throughbranch 26, the cock is further turned to establish communication withbranch 27, creating additional introduction of air-pressure. By thedescribed construction of chamber 9 and the arrangement of nozzle 30with ,relation thereto a powerful impetus is given the blast, not onlyby the forcing action of the air, but the suction produced thereby aswell, the enlarged chamber forming a large field of partial vacuum andthe contracted portion 12 of the pipe bringing the blast into the fullforce of the pressure from the nozzle. Upon further turning the cock toestablish communication with branch 27 still greater air-pressure isintroduced, the construction and arrangement of the chamber and nozzleand the effect of the blast from the nozzle being similar to thatdescribed with reference to branchl 27 and nozzle 30.

The advantages of my invention are apparent to those skilled in the art.Practice has demonstrated that when sand is damp it tends to clog.andbecome hard and that under this `circumstance the strongest blast,applied only cially noted that the introduction of air is so distributedas to insure a continuous and uniform blast of sand, thus overcoming thetendency heretofore experienced of having the sand and air expelled inalternate ejections.

I claimas my invention- 1. In a sand-blast, asand-receptacle, a pipeleading therefrom having a mixing-chamber, an air-supply leading to saidreceptacle and chamber, and means for controlling said supply whereby itmay be directed only to the rece'ptacle,or to the receptacle and suchchamber.

2. In asand-blast, a sand-receptacle, a pipe leading therefrom having aseries of mixingchambers, an air-supply leading to said receptacle andchambers, and means for controlling said supply lwhereby it may bedirected only to the receptacle, to the receptacle and one of suchchambers, or to the receptacle and all of such chambers. t

3. In a sand-blast, a sand-receptacle, a pipe leading therefrom havingtwo enlarged portions constituting mixing-chambers and a contractedportion intermediate such chambers, an air supply having separateconnections with said receptacle and each of said chambers, and meansfor controlling such supply.

4. In a sand-blast, a sand-receptacle, a pipe leading therefrom havingtwo approximately horizontal portions and an intermediate verticalportion, the latter being enlarged at its ends to form mixing-chambers,an air-supply having branches leading to said receptacle and chambers,one of such latter branches having a nozzle vertically disposed in theplane of the vertical portion of said pipe and extending into the upperchamber thereof, and the other of such branches having a nozzlehorizontally disposed in the plane of the lower horizontal portion ofsaid pipe and extending into the lower chamber, and means forcontrolling such air-supply.

5. In a sand-blast, a sand-receptacle, a discharge-pi pe leadingtherefrom having a series of mixing-chambers, an air-supply pipe havingbranches leading respectively to the receptacle and such chambers, andacock in said supply-pipe having ports designed respectively to registerwith the branches leading to the receptacle and chambers, the relativearrangement of said ports permitting communication to be establishedwith the receptacle alone, with the receptacle and one of said chambers,or with the receptacle and all of said chambers.

6. In a sand-blast, a sand-receptacle having an outlet, a discharge-pipesecured to said receptacle in alinement with said outlet, a valve withinsaid receptacle designed to regulate said outlet, said valve having apassage, a tubular rod to which said valve is secured, means foradjusting said rod, and means for supplying air thereto.

7 In a sand-blast@ sand-receptacle having an outlet, a discharge-pipesecured to said receptacle, and a valve within said receptacle designedto project into said pipe, said valve having an air-passage, means forconducting air to said passage, and means for regulating said valve.

8. In a sand-blast, a sand-receptacle having an outlet, adischarge-pipesecured to said receptacle and having its adjacent end flared, a valvewithin said receptacle of approximately conical formation designed toproject into said pipe, said valve having a central passage, anadjustable tubular rod within said receptacle secured to said Valve andhaving its passage 1n alinement with the passage in the latter, said rodhaving inlet and outlet ports, means for adjusting said rod, and meansfor supplying fluid-pressure thereto.

IOO

9. In a sand-blast, a sand-receptacle having an outlet in its bottom anda chamber on its top, a vertically-movable tubular rod extending.through said receptacle and chamber having a valve at its lower enddesigned to regulate said outlet; said valve having a passageway, saidrod being provided with an inletport at a point within said chamber, andoutlet-ports at a point within said receptacle above the normal level ofsand therein, means for raising and lowering said rod, and means forsupplying duid-pressure thereto.

10. In a sand-blast, the combination with the sand-receptacle having anoutlet, a discharge-pipe leading therefrom, said pipe having enlargedportions forming mixing-chambers, and a tubular rod having inlet andoutlet ports and carrying a valve designed to extend into said pipe andregulate said outlet,

l0 said valve having a passage-way, of a pres- .to the chambers beingextended into the latter,

and a cock in said supply-pipe having ports designed respectively toregisterwith said branches, whereby a partial turn will supply air tosaid rod, a further turn supply air to oneof said chambers, and a stillfurther turn supply air to the other of said chambers, thepreviously-created supplies being maintained during the establishment ofcommunication with each of said chambers.

In testimony whereof I have signed this Specification in the presence oftwo subscribingwitnesses.

FRANCIS STICKER.

Witnesses:

GRAFTON L. MoGrILL, FREDERICK S. S'rrr'r.

